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package com.bishe.service.impl;

import cn.dev33.satoken.stp.StpUtil;
import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.collection.CollStreamUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.bishe.entity.Course;
import com.bishe.entity.Teacher;
import com.bishe.entity.User;
import com.bishe.entity.resp.CommonPageRequest;
import com.bishe.entity.resp.CommonSortOrderEnum;
import com.bishe.exception.CommonException;
import com.bishe.mapper.CourseMapper;
import com.bishe.param.CourseAddParam;
import com.bishe.param.CourseEditParam;
import com.bishe.param.CourseIdParam;
import com.bishe.param.CoursePageParam;
import com.bishe.service.CourseService;
import com.bishe.service.TeacherService;
import com.bishe.service.UserService;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * courseService接口实现类
 *
 * @author wwz
 * @date 2024/03/11 13:54
 **/
@Service
public class CourseServiceImpl extends ServiceImpl<CourseMapper, Course> implements CourseService {

    @Resource
    private TeacherService teacherService;

    @Resource
    private UserService userService;

    @Override
    public Page<Course> page(CoursePageParam coursePageParam) {
        QueryWrapper<Course> queryWrapper = new QueryWrapper<>();
        if (ObjectUtil.isAllNotEmpty(coursePageParam.getSearchKey(), coursePageParam.getSearchValue())) {
            queryWrapper.eq(true, StrUtil.toUnderlineCase(coursePageParam.getSearchKey()), coursePageParam.getSearchValue());
        }
        if (ObjectUtil.isAllNotEmpty(coursePageParam.getSortField(), coursePageParam.getSortOrder())) {
            CommonSortOrderEnum.validate(coursePageParam.getSortOrder());
            queryWrapper.orderBy(true, coursePageParam.getSortOrder().equals(CommonSortOrderEnum.ASC.getValue()),
                    StrUtil.toUnderlineCase(coursePageParam.getSortField()));
        } else {
            queryWrapper.lambda().orderByAsc(Course::getId);
        }
        return this.page(CommonPageRequest.defaultPage(), queryWrapper);
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void add(CourseAddParam courseAddParam) {
        Course course = BeanUtil.toBean(courseAddParam, Course.class);
        this.save(course);
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void edit(CourseEditParam courseEditParam) {
        Course course = this.queryEntity(courseEditParam.getId());
        BeanUtil.copyProperties(courseEditParam, course);
        String uid = String.join(",", courseEditParam.getUid());
        course.setUid(uid);
        this.updateById(course);
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void delete(List<CourseIdParam> courseIdParamList) {
        // 执行删除
        this.removeByIds(CollStreamUtil.toList(courseIdParamList, CourseIdParam::getId));
    }

    @Override
    public Course detail(CourseIdParam courseIdParam) {
        return this.queryEntity(courseIdParam.getId());
    }

    @Override
    public Course queryEntity(String id) {
        Course course = this.getById(id);
        if (ObjectUtil.isEmpty(course)) {
            throw new CommonException("course不存在，id值为：{}", id);
        }
        return course;
    }

    @Override
    public List<Course> myCourseStu() {
        StpUtil.checkLogin();

        List<Course> courseList = list();
        // 查询我的课程
        List<Course> result = new ArrayList<>();
        for (Course course : courseList) {
            String tid = course.getTid();
            Teacher byId = teacherService.getById(tid);
            course.setTid(byId == null ? "" : byId.getName());
            if (StrUtil.isNotEmpty(course.getUid())) {
                if (Arrays.asList(course.getUid().split(",")).contains(StpUtil.getLoginIdAsString())) {
                    result.add(course);
                }
            }
        }
        return result;
    }

    @Override
    public List<Course> myCourseTea() {
        StpUtil.checkLogin();
        // 查询我的课程
        return list(Wrappers.lambdaQuery(Course.class).in(Course::getTid, StpUtil.getLoginIdAsString()));
    }

    @Override
    public Map<String,Object> userList() {
        Map<String, Object> admin = userService.list().stream().filter(s -> !s.getName().equals("admin")).collect(Collectors.toMap(User::getId, User::getName));
        return admin;
    }
}
